Composite resistance spot welding electrode

Details Composite resistance spot welding electrode Composite resistance spot welding electrode

1983-03-09

1985-04-30

Envall, Jr., Roy N.

Electric heating

Metal heating

For bonding with pressure

219 8625, B23K 1130

Patent

active

045146128

ABSTRACT:
A composite electrode configuration prevents mushrooming of resistance spot welding electrodes due to local high contact pressure and current densities. For a truncated electrode, an outer sleeve of high strength and high electrical resistivity material is attached to the end of the electrode and takes the high contact stress at the edge of the flat end face. A spherical end electrode has a plug of higher strength material in the center where the highest contact stress exists, and the outer sleeve reduces the joule heating effect. A transverse insulating spacer is a thermal and electrical barrier.

REFERENCES:
patent: 1176614 (1919-03-01), Stanley
patent: 1982098 (1934-11-01), Hartmann
patent: 2180396 (1939-11-01), Burke
patent: 3363086 (1968-01-01), Ecklund et al.
patent: 3592994 (1971-07-01), Ford
patent: 3689731 (1972-09-01), Miller
patent: 3909581 (1975-09-01), Stone et al.

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